LED原理及应用

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1、LEDContentsWhatisLED?ImportantSignificanceandApplicationBasicStructureofLEDanditsilluminantprincipleRecentResearchandProblemsWhatisLED?ImportantSignificanceandApplicationLED(LightemittingDiode)EnergySavingEnvironmentFriendlyLong-lifelightingsourceForExample,...Application:Optoel

2、ectronicIndustryLatentadvantagesineconomicdevelopmentPNJunctionWearesurroundedbyLEDwhereveryougoandwhateveryoudo…LEDindustryfrom2005to20111.LEDisapromisingindustry2.HBLED,especiallywhitelightLEDisinurgentdemandApplicationofdifferentlightcolorBasicStructureofLEDanditsilluminantpr

3、inciplepelectrodeTransparentpzoneconductivelayernelectrodeActiveLayernzoneSubstrateIlluminantprincipleConstructionFeatureandCurrentNeeds:1.Widebandgapsemiconductor2.Increaseradiativerecombination3.Increaseelectro-opticsconvertionefficiencyRecentResearchandProblemsEpitaxialWaferT

4、hreePartsChipProcessPackagingListsometechnologiesandtheiradvantagesanddisadvantages:SubstrateandBufferlayer(Al2O3;SiC;Si)(AlN;GaN)Transparentconductivefilm(ITO;ZnO)Surfaceroughness(increasecriticalangular)ResearchLEPSTechnologyTechnologyDBR(DistributedBraggReflection)PC(Photonic

5、Crystal)TFFC(ThinFilmFlipChips)ITO/ZnOITO/ZnOSubstratePZoneNZoneBufferlayerSubstrateSubstrateSubstrate